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Physics
The displacement x (in centimetres) of an oscillating particle varies with time t (in seconds) according to the equation Find (a) the amplitude of oscillation (b) the time period of oscillation (c) the maximum velocity of the particle (d) the maximum acceleration of the particle
Chemistry
A white crystalline compound A swells up on heating and gives violet coloured flame on burning. Its aqueous solution gives the following reactions. (i) White precipitate with BaCl₂, insoluble in acids. (ii) With excess of NH₄OH, white gelatinous precipitate is obtained which dissolves in NaOH and reappears with the addition of NH₄Cl (iii) It gives yellow precipitate with sodium cobaltinitrite solution. Identify A giving equations involved.
Mathematics
Multiple Choice Question If y = a log \|x\| + bx² + x has its extremum values at x = -1 and x = 2, then (a) a = 2, b = -1 (b) a = 2, b = -1/2 (c) a = -2, b = 1/2 (d) none of these